Covers the three main types of rocks, different weathering processes, erosion, and the rock cycle.

Learn about the different stages of the Earth's water cycle, and about processes involving water, including runoff, infiltration, and the differences between hard and soft water.

Discusses food, why we need it, and the types of nutrients that food for humans must have.

Learn about the five things that all living things need to survive and why they are critical for both plants and animals.

Discusses the five characteristics that living things have and nonliving things do not.